Power-transmitting apparatus



A. E. EscoTT POWER TRANSMITTING APPARATUS v March 16 1926.

Filed'August 4v, 1925 2 sheets-sheet 1 March 16 1926.

A. E. ESCOTT POWER TRANSMITTING APPARATU Filed August 4. 1925 2Sheets-Sheet 2 d mwaw@ Patented Mar. 16, 192.6..

ALBERT EDWARD ESCOIT, OF UIPPER1NORWOOD, LONDON, ENGLAND. U

f POWER-TRANSMITTING APPARATUS.

Application ledgAugust 4, 1925. Serial No. 48,063.

To all whom t may concern; y

Be it known that I, ALBERT EDWARD Es- GOTT, a subject of the KingofGreat Britain, residing at Oaknoll27, Central Hill, Upper Norwood,London, in the. county of Surrey, England, have invented certain 'newand useful Improvements in or Relating to Power-Transmitting Apparatus,of which the following is a specification. e v o This invention'relatesto power transmitting apparatus of the kind described withreference to'Figures 3 and 4 of thel drawings of my United States PatentNo. 1507369, in

which a. numberof paddles are geared to-,

getherby a train of sun and planet wheels hereinafter referred to as theoriginaltrain.

According to the present invention a train of sun and planet wheelsadditional v,to the original train of sun and planet wheels is providedwiththe object of giving a definite and positive low-gear drive whichpreferably comes into action automatically when the resistance toturning of the driven element is such that, ordinarily, the planetwheels of the original train would roll round the sun-wheel of thistrain without rotating the latter sun-wheel. 'Ihe additional traincomprises a sunwheel which is of smaller 'diameter than the sun-wheel ofthe original train and which by the provision of a ratchet, free-wheelor other device is made capable of rotation in one direction only. Uponthe paddle spindles are rigidly. mounted planet wheels which engage theadditional or smaller sun-wheel and which are tlierefore of largerdiameter .than the planet wheels of the original train. In oneconstructional form the enclosing drum may be rotatable the originalsun-wheel being attached thereto, and the additional sun-wheel may bemounted rigidly .upon a sleeve which extends outside the drum and has aratchet wheelengaged by a pawl carried by any convenient fixed support.I may replace the said ratchet wheel and pawl by a brake drum and abrake band or brake shoes; the band or shoes may be automaticallyapplied by a 4cam when the additional sun-wheel tends to turn in theopposite direction to the primary .or driving shaft or the said band orshoes may when required be applied by means of a hand lever or a pedal.Y

In a modified construction for obtaining va positive low gear drive theadditional sunwheel and the aforesaid enclosing drum are made rigid withthe primary or` driving shaft, the original sun-wheelis made rigid withthe secondary or driven shaft, whilst the side plates or spiders whichcarry the spindles to which the twosets o f planet wheels are rigidlyconnected, are not ,definitely fixed to either the primary or thesecondary shaft units, these side plates or spiders being controlled bya pawl and ratchet `arrangement or by a brake as aforesaid.

In order that the said inventionl may be clearly understood and readilycarried into i effect, the same will now.l be described more fully withreference to the accompanying drawings, in which- Figure lis an axialsection shewinor `diagrammatically one form of apparatus 1n accordancewith this invention,

Figure 2 is a side elevation shewing the aforesaid brake arrangement,and,

Figure 3 is a view similarto Figure 1 shewing diagrammatically anotherform of apparatus in accordance with this invention.

In the accompanying drawings those parts which correspond to equivalentparts of F igures 3 and 4 ofv the drawings ofmy aforesaid Patent No.1507369 are represented by the same reference numerals, that is to say 1is the enclosing drum containing a quantity of liquid (such, forexample, as glycerine) and-2 is the shaft on which the said drumisfreely mounted; 3, 3 are two of several` spindles provided with vanes4, 4v and rotatably carried by side plates or spiders 5 and 6 which, inthe construction shewn by Figure 1 of the accompanying drawings, are

keyedto the shaft 2. The paddle spindles 3,'3 have fixed thereto theoriginal planet wheels 9, 9 meshing with the original sunwheel 8 whichin Figure 1 is fixed to one of the end walls 1a of the drum V1.

Referring to Figure 1, each of the spindles 3, 3 has rigidly mountedthereon an additional planet wheel 12 meshing with an additionalsun-wheel 13, the latter sunwheel being of smaller diameter than theoriginal sun-wheel 8 and the additional planet wheels 12 beingthereforeof larger diameter than the'aforesaid original planet wheels 9. v Thesaid additional sunwheel 13 is rigid with a sleeve 14 which extends`outside the end wall ures 3 yand 4 of my aforesaid patent, when theresistance to r'otation of the paddles 4 is balanced by the resistanceto rotation of the original sun-wheel 8, then the planet wheels 9 will,without rotating, carry the sun-wheel 8 round at the same speed as thedriving element, and the planet wheels 12 of the additional train willalso carry round the sun-wheel 13 with which they are in mesh, theratchet wheel 15 and pawl 16 being so `arranged as to permit movement inthis direction. When however' the resistance of the sun-wheel 8 toturning increases, and the degree of rolling movement of the planetwheels 9 aroundthe sun-wheel 8 likewise increases, a point will bereached when thc additional planet wheels 12, being of larger diameterthan the original planet wheels 9, will tend to rotate the additionalsun-wheel 13 in the opposite direction. The 'latter sunwheel howevercannot rotate in this direction ,as it is held by the pawl 16. lIt willtherefore be seen` that under these conditions, owing to the differentgear ratios of the two trains, the sun-wheel 8 will .be drivenpositively but at a low angular speed compared with the angular speed ofthe driving element comprising the spiders 5 and G, the paddles 4 andthe planet wheels 3.

Referring to Figure 2, the sleeve 14 of Figure 1 has keyed or otherwisesecured thereto a `brake drum 17 with which a brake band 18 is intendedto co-operate. One end of this band is connected at 19 to one arm of alever 20 which is pivoted at 21 to a fixed support, and the other end ofthis band is connected by a rod A2,2 to the other arm of vthis lever.`The latter arm is extended and against it bears an operating lever 23.pivoted at 23a to the fixed support. This operating lever has atailpiece 24 with which a cam 25 on the brake drum 17 co-operates. Thuswhen the sun-wheel 13 commences to rotate in the direction of the arrowin Figure 2 the shoulder 26 on the said cani will come against thetailpiece 24 and rock the operating lever 23 which operates the lever 2Oto apply the brake band 1.8 and thus prevent further rotation of thesun-wheel 13 in the said direction; rotation in the opposite directionis permitted as the cam 25 merely rocks the operating lever 23 in ananti-clockwise direction without applying the brake band. Instead of thesaid automatic cam arrangement and the Vpawl and ratchet arrangement ofFigure 1, a brake applied when required by means of a hand lever orapedal may be. provided. For example the lever 20 may be extended to forma handle as shewn in broken lines in Figure 2.

Referring to Figure 3, the additional sunwheel 13 lis made rigid with.the shaft 2 as is also the drum 1, whilst the original sunwheel 8 ismade rigid with a shaft 2a. The side plates or spiders 5 and 6 carryingthe spindles 3, 3 to which the paddles 4 and the two sets of planetwheels 9 and 12 are rigidly connected, are not fixed to either of theshafts 2 and `2a. One of these side plates is made rigid with a sleeveI6'l which extends throughone `of the end walls 1a on the drum and isformed with a ratchet wheel 6", a pawl co-operating with this ratchetwheel serving the same function as the pawl 16 of Figure 1. Instead ofthis pawl and ratchet arrangement in Figure 3, an automatic cam operatedbrake (or a hand operated brake) as hereinbefore described, could beemployed, the brake drum replacing the ratchet wheel 6" in the mannerdescribed with reference to Figure 2.

What I claim and desire lto secure by `Letters Patent of the UnitedStates is 1. In a power transmitting apparatus of the kind referredto,the combination with a driving elementv and av driven element, of adrinn containing a quantity of liquid, a sys- -tem of paddles arrangedwithin said drum,

supports in which said paddles are rotatably mounted, a sun-wheel on oneof said elements, planet wheels connected to said paddles and meshingwith said sun wheel, an additional sun wheel of smaller diameter thanthe forme-r sun wheel, and other planet wheels connected to said paddlesand meshing with said additional sun wheel.

2. In power transmitting apparatus the combination with the drivingelement and the driven element, of a drum rotating with said drivingelement and containing a quantity of liquid, a system of paddlesarranged within said drum, supports in which said paddles are rotatablymounted, said supports loosely mounted with respect to both the drivingelement and the driven element, a sun wheel on said drivenelement,planet ,wheels connected to said paddles and meshing with said sunwheel, an additional sun wheel of smaller diameter on said drivingelement, 'and other planet wheels vconnected to said paddles and meshingwith said additional sun wheel.

3. In power transmitting apparatus, the combination with the partsclaimed in claim 2, of means for preventing the rotation of the supportsin one direction.

4. In power transmitting apparatus, the combination with the partsclaimed in claim 2, of a sleeve connected to one of the supports andextending beyond thel adjacent end wall of the drum, and Vmeansco-operating with said sleeve for preventing rotation of the supports inone direction.

5. In power transmitting apparatus, the combination with the partsclaimed in claim 2, of a brake member connected to one of said supports,a braking element adapted to co-operate with said brake member and meansfor automaticallyapplying said brkaing element when the supportscommence to rotate in one direction, the said means perwith said sleeve,a braking element adapted mitting free rotation of the supports in theto co-operate With said brake member and l0 other direction. means forautomatically applying said 6. In power transmitting apparatus, thebraking element when the supports com- Y 5 combination with the partsclaimed in claim mence to rotate in one directiomvthe said 2, of asleeve connected to one of the supmeans permitting` free rotation of thesupports and extending beyond the adjacent end ports in the otherdirection.

Wall of the drum, a brake member rigid ALBERT EDWARD ESCOTT.

